We can invent only with memory.
The real use of gunpowder is to make all men tall.
We owe to the Middle Ages the two worst inventions of humanity -- gunpowder and romantic love.
Anything that won't sell, I don't want to invent. Its sale is proof of utility, and utility is success.
Today every invention is received with a cry of triumph which soon turns into a cry of fear.
Fear is a great inventor.
Inventing is a combination of brains and materials. The more brains you use, the less material you need.
The guns and bombs, the rockets and the warships, all are symbols of human failure.
I am proud of the fact that I never invented weapons to kill.
Accident is the name of the greatest of all inventors.